Jane Street’s MarketAxess Holdings MKTX Stock Holding History

Jane Street’s Portfolio MKTX Stock Details MKTX Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$2.1M	Buy	12,740 +348	+3%	+$61K	﹤0.01%	4984
2025 Q4	$2.25M	Sell	12,392 -155,230	-93%	-$26.5M	﹤0.01%	4587
2025 Q3	$29.2M	Buy	167,622 +70,843	+73%	+$13.9M	﹤0.01%	1316
2025 Q2	$21.6M	Buy	96,779 +2,256	+2%	+$496K	﹤0.01%	1382
2025 Q1	$20.5M	Buy	94,523 +83,638	+768%	+$17.6M	0.01%	1277
2024 Q4	$2.46M	Sell	10,885 -15,233	-58%	-$4.01M	﹤0.01%	3749
2024 Q3	$6.69M	Sell	26,118 -57,066	-69%	-$13.4M	﹤0.01%	2408
2024 Q2	$16.7M	Buy	83,184 +51,252	+161%	+$10.6M	﹤0.01%	1484
2024 Q1	$7M	Sell	31,932 -13,671	-30%	-$3.23M	﹤0.01%	2192
2023 Q4	$13.4M	Buy	45,603 +34,584	+314%	+$8.36M	﹤0.01%	1651
2023 Q3	$2.35M	Sell	11,019 -36,278	-77%	-$8.79M	﹤0.01%	3782
2023 Q2	$12.4M	Buy	47,297 +14,862	+46%	+$4.43M	﹤0.01%	1689
2023 Q1	$12.7M	Buy	32,435 +24,360	+302%	+$8.63M	0.01%	1395
2022 Q4	$2.25M	Sell	8,075 -27,583	-77%	-$7.1M	﹤0.01%	3684
2022 Q3	$7.93M	Buy	35,658 +18,319	+106%	+$4.7M	﹤0.01%	1966
2022 Q2	$4.44M	Buy	17,339 +11,587	+201%	+$3.17M	﹤0.01%	2850
2022 Q1	$1.96M	Buy	5,752 +3,498	+155%	+$1.27M	﹤0.01%	4806
2021 Q4	$927K	Sell	2,254 -1,507	-40%	-$594K	﹤0.01%	6042
2021 Q3	$1.58M	Buy	3,761 +207	+6%	+$95K	﹤0.01%	4966
2021 Q2	$1.65M	Buy	3,554 +2,675	+304%	+$1.27M	﹤0.01%	4732
2021 Q1	$438K	Sell	879 -4,189	-83%	-$2.23M	﹤0.01%	7039
2020 Q4	$2.89M	Buy	5,068 +1,882	+59%	+$1.03M	﹤0.01%	2870
2020 Q3	$1.53M	Sell	3,186 -2,477	-44%	-$1.22M	﹤0.01%	3427
2020 Q2	$2.84M	Sell	5,663 -31,897	-85%	-$14.9M	﹤0.01%	2588
2020 Q1	$12.5M	Buy	37,560 +36,530	+3,547%	+$12.7M	0.01%	651
2019 Q4	$390K	Sell	1,030 -5,756	-85%	-$2.11M	﹤0.01%	3979
2019 Q3	$2.22M	Sell	6,786 -7,573	-53%	-$2.71M	﹤0.01%	1692
2019 Q2	$4.62M	Buy	14,359 +13,313	+1,273%	+$3.85M	0.01%	1103
2019 Q1	$257K	Sell	1,046 -994	-49%	-$225K	﹤0.01%	4413
2018 Q4	$431K	Sell	2,040 -80	-4%	-$16.6K	﹤0.01%	3623
2018 Q3	$378K	Buy	+2,120	New	+$407K	﹤0.01%	3945
2018 Q2	–	Sell	-1,826	Closed	-$397K	–	5368
2018 Q1	$397K	Sell	1,826 -987	-35%	-$203K	﹤0.01%	3724
2017 Q4	$568K	Sell	2,813 -479	-15%	-$90.4K	﹤0.01%	3018
2017 Q3	$607K	Buy	3,292 +929	+39%	+$178K	﹤0.01%	2865
2017 Q2	$475K	Sell	2,363 -1,096	-32%	-$210K	﹤0.01%	3096
2017 Q1	$648K	Sell	3,459 -3,579	-51%	-$649K	﹤0.01%	2584
2016 Q4	$1.03M	Sell	7,038 -918	-12%	-$146K	﹤0.01%	2023
2016 Q3	$1.32M	Buy	7,956 +3,604	+83%	+$585K	0.01%	1626
2016 Q2	$633K	Buy	+4,352	New	+$579K	﹤0.01%	2508
2015 Q4	–	Sell	-4,876	Closed	-$453K	–	4282
2015 Q3	$453K	Buy	4,876 +2,253	+86%	+$218K	﹤0.01%	2396
2015 Q2	$243K	Buy	+2,623	New	+$231K	﹤0.01%	3062
2014 Q1	–	Sell	-4,542	Closed	-$304K	–	2916
2013 Q4	$304K	Buy	+4,542	New	+$299K	﹤0.01%	1637

Other funds holding MKTX

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return

AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

NRCM

North Reef Capital Management Laguna Beach, California $2.91B AUM 11.03% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

VanEck Associates New York $133B AUM 72.99% 1-Year Est. Return

Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Jane Street's MKTX Position: Q1 2026 in Review

Jane Street increased its MarketAxess Holdings (MKTX) stake by 2.8% in Q1 2026, buying an estimated $61K and bringing the position to 12,740 shares worth $2.1M. The position accounts for ﹤0.01% of the portfolio, ranked #4984.

Jane Street first reported a position in MKTX in Q4 2013 and has held it in 42 quarters since. The position peaked at $29.2M in Q3 2025. 448 funds tracked by Wall St. Rank hold MKTX as of Q1 2026.

Jane Street held 12,740 shares of MarketAxess Holdings worth $2.1M as of Q1 2026.
Jane Street bought 348 MarketAxess Holdings shares in Q1 2026, an estimated $61K.
MarketAxess Holdings made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #4984 holding.
Jane Street first reported a position in MarketAxess Holdings in Q4 2013 and has held it in 42 quarters since.
Jane Street's MarketAxess Holdings position peaked at $29.2M in Q3 2025.
448 funds tracked by Wall St. Rank held MarketAxess Holdings as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.